package com.bbs.util;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class MyFilter implements Filter {
	private String encoding;

	public void destroy() {

	}

	/**
	 * 过滤器，转换编码为UTF-8
	 */
	public void doFilter(ServletRequest req, ServletResponse resp,
			FilterChain chain) throws IOException, ServletException {
		HttpServletRequest request = (HttpServletRequest)req;
		HttpServletResponse response = (HttpServletResponse)resp;

		request.setCharacterEncoding(encoding);
		response.setCharacterEncoding(encoding);
		
		chain.doFilter(request, response);
	}

	public void init(FilterConfig config) throws ServletException {
		encoding = config.getInitParameter("encoding");
		if("".equals(config) || config == null){
			encoding = "UTF-8";
		}
	}

}
